- #1
Raihan amin
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Homework Statement
Think of a drop of radius ##R## deposited on a fibre of radius ##b(b<<L)##.Find ##{\Delta{P}}##
Homework Equations
The relationship between excess pressure and the surface tension is given by Yong-Laplace equation,
$$\Delta{P} = \sigma{(\frac{1}{R_1}+\frac{1}{R_2})}$$
The Attempt at a Solution
[/B]Here i can't figure out what will be ##R_1##and##R_2## .I know that the curvature of radius is defined as $$R=\frac{y''}{(1+y'^2)^\frac 3 2 }$$ if ##y'##is the derivative of y with respect to ##x##.But in the solution, they have used two different formula for ##R_1## and ##R_2##.
Can anyone help me understand these?